51fab8f36f
A recent change to MemorySSA caused LLVM to start optimizing the call to 'f(x)' into just 'x', despite the 'noinline' attribute. So try harder to prevent this optimization from firing.
26 lines
565 B
C++
26 lines
565 B
C++
// RUN: %clangxx_msan -O0 %s -o %t && %run %t >%t.out 2>&1
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// RUN: %clangxx_msan -O1 %s -o %t && %run %t >%t.out 2>&1
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// RUN: %clangxx_msan -O2 %s -o %t && %run %t >%t.out 2>&1
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// RUN: %clangxx_msan -O3 %s -o %t && %run %t >%t.out 2>&1
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// Test that (no_sanitize_memory) functions DO NOT propagate shadow.
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#include <stdlib.h>
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#include <stdio.h>
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__attribute__((noinline))
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__attribute__((weak))
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__attribute__((no_sanitize_memory))
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int f(int x) {
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return x;
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}
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int main(void) {
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int x;
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int * volatile p = &x;
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int y = f(*p);
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if (y)
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exit(0);
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return 0;
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}
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